142821143 has 6 divisors (see below), whose sum is σ = 147916704. Its totient is φ = 137895464.

The previous prime is 142821137. The next prime is 142821149. The reversal of 142821143 is 341128241.

It is an interprime number because it is at equal distance from previous prime (142821137) and next prime (142821149).

It is not a de Polignac number, because 142821143 - 2⁶ = 142821079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142821149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84071 + ... + 85752.

It is an arithmetic number, because the mean of its divisors is an integer number (24652784).

Almost surely, 2^142821143 is an apocalyptic number.

142821143 is a deficient number, since it is larger than the sum of its proper divisors (5095561).

142821143 is an equidigital number, since it uses as much as digits as its factorization.

142821143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169881 (or 169852 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 142821143 is about 11950.7800163839. The cubic root of 142821143 is about 522.7140433914.

Adding to 142821143 its reverse (341128241), we get a palindrome (483949384).

The spelling of 142821143 in words is "one hundred forty-two million, eight hundred twenty-one thousand, one hundred forty-three".